Sirine C. Fakra
Lawrence Berkeley National Laboratory
HyperaccumulatorChemistryMaterials scienceSeleniumBotany
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Publications 108
#1Tracy M. Mattox (LBNL: Lawrence Berkeley National Laboratory)H-Index: 10
#2Georgia Bolek (LBNL: Lawrence Berkeley National Laboratory)
Last. Jeffrey J. Urban (LBNL: Lawrence Berkeley National Laboratory)H-Index: 40
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Abstract Sodium borohydride (NaBH4) has been a material of interest for many years in developing metal boride complexes and shows a great deal of potential as a hydrogen storage material. Though many have used various additives as catalysts to weaken the bonds within NaBH4 to create a more energetically favorable material, very little is understood about how the borohydride interacts with and changes the additives being incorporated. This work uses ball milling to incorporate calcium chloride (C...
#1J. G. Hall (MIT: Massachusetts Institute of Technology)H-Index: 1
#2Emily F. Smith (Johns Hopkins University)H-Index: 11
Last. Tanja Bosak (MIT: Massachusetts Institute of Technology)H-Index: 24
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Three-dimensionally preserved Ediacaran fossils occur globally within sandstone beds. Sandy siliciclastic deposits of the Ediacaran Wood Canyon Formation (WCF) in the Montgomery Mountains, Nevada, ...
1 CitationsSource
#1Abhishek ParijaH-Index: 10
#2Joseph V. Handy (A&M: Texas A&M University)
Last. Wanli Yang (LBNL: Lawrence Berkeley National Laboratory)H-Index: 48
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Summary Silicon circuitry has dominated the semiconductor industry for decades but is constrained in its power efficiency by the Fermi-Dirac distribution of electron energies. Electron-correlated transition metal oxides exhibiting metal-to-insulator transitions (MITs) are excellent candidates for energy-efficient computation, which can further emulate the spiking behavior of biological neural circuitry. We demonstrate that β′-CuxV2O5 exhibits a pronounced nonlinear response to applied temperatur...
#1Yifan Li (University of California, Berkeley)H-Index: 8
#2Dohyung Kim (University of California, Berkeley)H-Index: 19
Last. Peidong Yang (University of California, Berkeley)H-Index: 152
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Promotion of C–C bonds is one of the key fundamental questions in the field of CO2 electroreduction. Much progress has occurred in developing bulk-derived Cu-based electrodes for CO2-to-multicarbons (CO2-to-C2+), especially in the widely studied class of high-surface-area “oxide-derived” copper. However, fundamental understanding into the structural characteristics responsible for efficient C–C formation is restricted by the intrinsic activity of these catalysts often being comparable to polycry...
1 CitationsSource
#1Gavin C. Stonehouse (CSU: Colorado State University)H-Index: 2
#2Brandon Jude McCarron (CSU: Colorado State University)H-Index: 1
Last. Elizabeth A. H. Pilon-Smits (CSU: Colorado State University)H-Index: 54
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Selenium (Se) deficiency and toxicity affect over a billion people worldwide. Plants can mitigate both problems, via Se biofortification and phytoremediation. Here we explore the potential of hemp ...
1 CitationsSource
#1Joseph R. Salazar (DU: University of Denver)H-Index: 1
#2Benton T. Cartledge (DU: University of Denver)H-Index: 2
Last. Brian J. Majestic (DU: University of Denver)H-Index: 13
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Abstract. Iron is the most abundant transition element in airborne particulate matter (PM), primarily existing as Fe(II) or Fe(III). Generally, the fraction of water-soluble iron is greater in urban areas compared to areas dominated by crustal emissions. To better understand the origin of water-soluble iron in urban areas, tailpipe emission samples were collected from 32 vehicles with emission certifications of Tier 0 low emission vehicles (LEV I), Tier 2 low emission vehicles (LEV II), ultralow...
1 CitationsSource
#1Eszter Borbála Both (CSU: Colorado State University)H-Index: 1
#2Gavin C. Stonehouse (CSU: Colorado State University)H-Index: 2
Last. Elizabeth A. H. Pilon-Smits (CSU: Colorado State University)H-Index: 54
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Abstract Cardamine violifolia (family Brassicaceae) is the first discovered selenium hyperaccumulator from the genus Cardamine with unique properties in terms of selenium accumulation, i.e., high abundance of selenolanthionine. In our study, a fully comprehensive experiment was conducted with the comparison of a non-hyperaccumulator Cardamine species, Cardamine pratensis, covering growth characteristics, chlorophyll fluorescence, spatial selenium/sulfur distribution patterns through elemental an...
1 CitationsSource
#1R. Jason B. Reynolds (CSU: Colorado State University)H-Index: 1
#2Rachel R. Jones (CSU: Colorado State University)H-Index: 1
Last. Elizabeth A. H. Pilon-Smits (CSU: Colorado State University)H-Index: 54
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In these studies we identified and compared the properties of plant species that showed positive or negative co-occurrence with selenium (Se) hyperaccumulators in their natural habitat. The main questions addressed were: which species are most abundant directly adjacent to hyperaccumulators, and which are absent? How do Se accumulation and tolerance compare in species found to positively or negatively co-occur with hyperaccumulators? Approaches included field surveys, X-ray microprobe analysis o...
#1Ankun Yang (Stanford University)H-Index: 20
#2Guangmin Zhou (Stanford University)H-Index: 55
Last. Bofei Liu (Stanford University)H-Index: 15
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It has recently been shown that sulfur, a solid material in its elementary form S8, can stay in a supercooled state as liquid sulfur in an electrochemical cell. We establish that this newly discovered state could have implications for lithium–sulfur batteries. Here, through in situ studies of electrochemical sulfur generation, we show that liquid (supercooled) and solid elementary sulfur possess very different areal capacities over the same charging period. To control the physical state of sulfu...
4 CitationsSource
#1Elizabeth M. Boatman (Wake Forest University)H-Index: 1
#1Elizabeth M. Boatman (Wake Forest University)H-Index: 3
Last. Mary H. SchweitzerH-Index: 28
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The idea that original soft tissue structures and the native structural proteins comprising them can persist across geological time is controversial, in part because rigorous and testable mechanisms that can occur under natural conditions, resulting in such preservation, have not been well defined. Here, we evaluate two non-enzymatic structural protein crosslinking mechanisms, Fenton chemistry and glycation, for their possible contribution to the preservation of blood vessel structures recovered...
3 CitationsSource